The Sunny Side Up: An Interdisciplinary Overview of Sunlight’s Effects on our Health

Abstract

Do levels of daily sunlight exposure have a measurable effect on peoples’ health? I used to live in Michiganwhere it is cloudy seemingly every day. This is drastically different from Texas, where the sun is almost alwaysshining. It is well known that an increase in sunlight exposure can drastically affect one’s mood; when looking atcloudy areas versus areas full of sunshine, the difference in overall happiness and rates of depression can bequite dramatic. Another factor to consider is that spending more time in direct sunlight can help with vitaminD synthesis. Low vitamin D levels can lead to all sorts of health problems, demonstrating that having directsun exposure has the potential to be very influential in one’s health. To investigate whether sunlight can have ameasurable impact on peoples’ health and life expectancies, I collected data on average life expectancies andreported happiness levels for all 50 U.S. States, as well as over 70 cities within the United States. These citieswere grouped together using K-means clustering to control for confounding variables, and then analyzed. Thisallowed for an accurate representation of whether sunlight really does affect one’s health or not. Data came fromthe United States Census Bureau, the CDC, and other reliable sources. This research highlights how certainclimate areas can affect our health, happiness, and overall life expectancy.